The security company's systems had decided that a virus called Huhk-C was present in the explorer.exe file, leading to its confinement or, in some cases, deletion. As Windows Explorer is the graphical user interface (GUI) for
Windows' file system, this made it difficult to perform many common tasks within the operating system, such as finding files.

David Emm, a senior technology consultant at Kaspersky Lab, told ZDNet UK on Friday that the company was still examining its checklist to find out why the false positive "slipped through the net."